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Datasheet Details
Part No.GD25Q20CEFG
MfrGIGADEVICE
Size1Mb
Pages64 pages
Description3.3V Uniform Sector Dual and Quad Serial Flash
Datasheet SummaryAI
1. Overview & Key Features

️· Memory Type: Serial Flash (SPI)
️· Density: 8Mb (Minimum)
️· Organization:
- 8,192 x 1,024 (8Mb)
- Divided into 64 Sectors of 32KB each
- Sector size can be programmed as 4KB or 32KB.
️· SPI Interface: Supports Standard SPI Mode (0, 1, 3, 4).
️· Operating Voltage: 2.3V - 3.6V
️· Quad SPI Mode: Supports Quad SPI for faster data transfer rates (when QE bit is set).
️· JEDEC Standard: Compliant with JEDEC SPI NOR Flash standards.
️· Security: Hardware and software protection features available.
️· Enhanced Reliability: Features for error correction and data integrity.

2. Block Diagram (Implied)

Although no explicit diagram is provided, we can infer:

️· SPI Interface: Standard SPI interface for communication.
️· Flash Memory Array: Contains the 8Mb of flash memory.
️· Status/Control Registers: Contains the status and control bits described in detail below.
️· Command Set Logic: Handles SPI commands and internal operations (program, erase, read, write status).
️· Quad SPI Logic: Enables quad SPI mode if QE is set.

3. Detailed Status Register Information (S15-S0)

Let's break down each bit. Crucially, read this carefully for how each bit impacts functionality.

Bit Name Description Read/Write Default
S15 SUS Erase/Program Suspend. Set by Erase/Program Suspend command. Cleared by Resume command, software reset, or power cycle. (Read-Only) Read Only 0
S14 CMP Memory Protection Mode. Used with BP bits to control protection. Default: 0. Read/Write 0
S13 HPF High Performance Flag. Indicates High Performance Mode. (Read-Only) Read Only 0
S12 Reserved Reserved for future use. (Should be written as 0) Read/Write 0
S11 Reserved Reserved for future use. (Should be written as 0) Read/Write 0
S10 LB Security Register Lock Bit. One-time programmable. Locks Security Registers. Read/Write 0
S9 QE Quad Enable. Enables Quad SPI operation. Also enables/disables WP# and HOLD#. Read/Write 0
S8 SRP1 Status Register Protection 1. Controls write protection of the Status Register. Read/Write 0
S7 SRP0 Status Register Protection 0. Controls write protection of the Status Register. Read/Write 0
S6 BP4 Block Protect 4. Software protection bit. Read/Write 0
S5 BP3 Block Protect 3. Software protection bit. Read/Write 0
S4 BP2 Block Protect 2. Software protection bit. Read/Write 0
S3 BP1 Block Protect 1. Software protection bit. Read/Write 0
S2 BP0 Block Protect 0. Software protection bit. Read/Write 0
S1 WEL Write Enable Latch. Enables write operations. Read/Write 0
S0 WIP Write In Progress. Indicates if a write operation is in progress. Read Only 0

Important Status Register Notes:

️· SRP (Status Register Protection): Critical for protecting the status register from accidental or unauthorized modification. Read the table in the datasheet carefully to understand the different protection modes.
️· CMP (Memory Protection Mode): Changes how the Block Protect bits (BP0-BP4) control memory protection.
️· QE (Quad Enable): Enabling this changes the flash memory’s operation.
️· LB (Security Register Lock): Locks the security registers, making them read-only.
️· WIP (Write In Progress): Must be 0 before initiating a new write operation.




This summary provides a comprehensive overview of the GD25Q20C. Always refer to the official datasheet for the most accurate and detailed information.
GD25Q20CEFG Datasheet with Chat AI
  • AIauthorized
    Hello, Please ask a question about GD25Q20CEFG Datasheet.
    Example questions: ➤ Describe the function of the srp1 and srp0 bits, and what determines whether the status register is protected or unlocked.➤ What happens when the wip bit in the status register is set to '1'?➤ What is the difference between setting the qe bit to '0' and '1', and what is the recommended setting to avoid potential issues?
    • Datasheet Details
    Part No.GD25Q20CEFG
    ManufacturerGIGADEVICE
    Size1Mb
    Pages64 pages
    Description3.3V Uniform Sector Dual and Quad Serial Flash
    Datasheet Summary AI Expand summary
    1. Overview & Key Features

    ️· Memory Type: Serial Flash (SPI)
    ️· Density: 8Mb (Minimum)
    ️· Organization:
    - 8,192 x 1,024 (8Mb)
    - Divided into 64 Sectors of 32KB each
    - Sector size can be programmed as 4KB or 32KB.
    ️· SPI Interface: Supports Standard SPI Mode (0, 1, 3, 4).
    ️· Operating Voltage: 2.3V - 3.6V
    ️· Quad SPI Mode: Supports Quad SPI for faster data transfer rates (when QE bit is set).
    ️· JEDEC Standard: Compliant with JEDEC SPI NOR Flash standards.
    ️· Security: Hardware and software protection features available.
    ️· Enhanced Reliability: Features for error correction and data integrity.

    2. Block Diagram (Implied)

    Although no explicit diagram is provided, we can infer:

    ️· SPI Interface: Standard SPI interface for communication.
    ️· Flash Memory Array: Contains the 8Mb of flash memory.
    ️· Status/Control Registers: Contains the status and control bits described in detail below.
    ️· Command Set Logic: Handles SPI commands and internal operations (program, erase, read, write status).
    ️· Quad SPI Logic: Enables quad SPI mode if QE is set.

    3. Detailed Status Register Information (S15-S0)

    Let's break down each bit. Crucially, read this carefully for how each bit impacts functionality.

    Bit Name Description Read/Write Default
    S15 SUS Erase/Program Suspend. Set by Erase/Program Suspend command. Cleared by Resume command, software reset, or power cycle. (Read-Only) Read Only 0
    S14 CMP Memory Protection Mode. Used with BP bits to control protection. Default: 0. Read/Write 0
    S13 HPF High Performance Flag. Indicates High Performance Mode. (Read-Only) Read Only 0
    S12 Reserved Reserved for future use. (Should be written as 0) Read/Write 0
    S11 Reserved Reserved for future use. (Should be written as 0) Read/Write 0
    S10 LB Security Register Lock Bit. One-time programmable. Locks Security Registers. Read/Write 0
    S9 QE Quad Enable. Enables Quad SPI operation. Also enables/disables WP# and HOLD#. Read/Write 0
    S8 SRP1 Status Register Protection 1. Controls write protection of the Status Register. Read/Write 0
    S7 SRP0 Status Register Protection 0. Controls write protection of the Status Register. Read/Write 0
    S6 BP4 Block Protect 4. Software protection bit. Read/Write 0
    S5 BP3 Block Protect 3. Software protection bit. Read/Write 0
    S4 BP2 Block Protect 2. Software protection bit. Read/Write 0
    S3 BP1 Block Protect 1. Software protection bit. Read/Write 0
    S2 BP0 Block Protect 0. Software protection bit. Read/Write 0
    S1 WEL Write Enable Latch. Enables write operations. Read/Write 0
    S0 WIP Write In Progress. Indicates if a write operation is in progress. Read Only 0

    Important Status Register Notes:

    ️· SRP (Status Register Protection): Critical for protecting the status register from accidental or unauthorized modification. Read the table in the datasheet carefully to understand the different protection modes.
    ️· CMP (Memory Protection Mode): Changes how the Block Protect bits (BP0-BP4) control memory protection.
    ️· QE (Quad Enable): Enabling this changes the flash memory’s operation.
    ️· LB (Security Register Lock): Locks the security registers, making them read-only.
    ️· WIP (Write In Progress): Must be 0 before initiating a new write operation.




    This summary provides a comprehensive overview of the GD25Q20C. Always refer to the official datasheet for the most accurate and detailed information.